Dividers: drag from one point to another on the chart

Start a drag on a charted object or buoy and it snaps to it. The readout gives the true bearing (and magnetic, 7°W) from where you start to where you are, and the distance in nautical miles.

Skill 3 · Dead reckoningProblem 364003

Two legs from a 1510 fix: where is the 1620 DR?

At 1510 you fix your position 293°T, 3.3 nm from Tern Island tower. You steer 173°T at 4.0 kn until 1555, then 026°T at 7.3 kn until 1620.

Give the 1620 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

Tolerance: 2° and 0.15 nm (or 4 % of the distance).

Given
1510 fix	293°T, 3.3 nm from Tern Island tower
Leg 1	173°T, 4.0 kn, 1510 to 1555
Leg 2	026°T, 7.3 kn, 1555 to 1620

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